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Siemens
Desigo TRA Engineering, mounting and installation
CM111043en_09
Building Technologies
KNX PL-Link room bus
2016-02-22
12.2 Bus topologies
Up to 64 devices with KNX PL-Link can be installed on one line (main line as well).
No restrictions apply to the type mix.
There is no need to calculate the bus load number E for up to 64 devices.
A maximum of 64 devices may be installed even if devices requiring less power
are used.
Permissible bus topologies are: Tree, line, and star topologies. These topologies
can be mixed as needed. However, ring topologies are not allowed.
The tree topology is advantageous if a large network must be created.
Tree topology (with stub lines)
Line topology (with loops)
PL-Link
PL-Link
N1 .. N7 Devices
Device with screw terminals
T branch with bus terminals
Device with spring cage
terminals
N1 .. N8 Devices
CE+
CE-
KNX+
KNX-
+ -
KNX
CE+ CE-
CE-
CE+
CE+
CE-
64 devices
on one line
Notes
Permissible bus
topologies
Advantage:
Tree topology
Branching and
connection variants
KNX PL-Link
KNX PL-Link